what can i safly feed my amp?

[miconar]

edit: real soory, this was suppose to in begginers project if someone could delete this...

[d95err]

I'm not expert on impedances and such, but since a typical (tube) amp has an input impedance of about 1M, I guess that a 1M resistor would work for the simulation.

I'm sure that anything you can generate using a 9V battery will be safe for your amp. As long as you have an output cap, there won't be any DC bias. As for signal level, it depends a lot on the impedance of the signal. A 10V high impedance signal is probably safe for an amp (though there will be a lot of distortion), but a 10V low impedance (speaker) signal could probably burn it.
(imagine the difference of being hit by a football going 30mph and being hit by a freight train going 30mph)

[miconar]

right, thanks alot for you help, and soory about all the postings, I was posting this at begginers forum im sure, but it kept poping up in here...

[petemoore]

  Moderation...and just 'knowing
  You might be able to damage your amp, all it takes in certain circumstances is a small touch more of 'whatever like treble to blow a speaker or...
  Generally over-inputting like this results in unwanted-ness coming out of the amp, and usually the amp owner stops and turns it down quickly...not all amp users do this though.